T-Pain Is On A Boat: Re: [Electric Boats] Sailboat Props

Sunday, February 24, 2019

Re: [Electric Boats] Sailboat Props - Data Please

I'm far from an expert, but as I looked into prop sizing for the repower of our diesel, I found that the Vic Prop calculator suggested a lot less bite than people's actual experience of what was needed. Sorry, don't remember the numbers. The difference, as near as i could figure, was due to the prop calculator assuming a much cleaner flow into the prop. Our particular boat, a Westsail 32 (very heavy full keel) has the prop in an aperture behind a portion of the keel which is about 5" wide.

On Sat, Feb 23, 2019 at 3:29 PM tvinypsi@gmail..com [electricboats] <electricboats@yahoogroups.com> wrote:

I'm studying a possible conversion to electric of my 35-year old full-keel sailboat. But the variable on which I'm having the most trouble finding experience-generated data is prop selection.

I'm aware of prop calculators out there, such as VicProp, but can anyone in this group report on the success of lack thereof, in the actual experience of using a calculator to make a selection?
Did you use VicProp or some other calculator to choose your electric-boat prop, and how did it work out?

If you are using an existing or stock propeller with your electric boat system, what are its specifications (# of blades, diameter, pitch, & mfg.); what power output is your motor (Kw); Max RPM/Reduction ratio (propeller RPMs in other words); and performance?

I'm aware of the data sheet available on this group, but the prop information is spotty. However, mainly, I'd be interested in hearing of anyone's experience with a prop calculator, and which one.

Any help out there?

[-tv]
Tom VanderMeulen
"Grace O'Malley"
Cape Dory 27

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Posted by: Mike Ransom <likeabikemike@gmail.com>

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